Hard drives never sleep. Explorer.exe access them every 10 minutes

I have annoying problem with windows 10, all my loud non OS hard drives never sleep because explorer.exe is accessing them exactly every 10 minutes and querying them for free space.
I used Process monitor to verify this.

Its a clean install of windows 10 I haven't even installed anything yet. Any ideas how to stop it?

You can always try, go to run- service.msc, then go to windows search RT click properties - stop, disable, and see if it helps, stops file indexing. Also stop defender from Real time protection of these drives.

Windows had assigned a drive letter to a RAW partition. I removed the drive letter and now even though explorer still queries the other NTFS partitions every 10 minutes, the drive doesn't need to spin up in response.